Examine source code of JanuszStock

{
  "manifest_version": 2,
  "minimum_chrome_version": "49",
  "name": "JanuszStock",
  "description": "Extension places marks next to stocks supported by Revolut on listings from Webull.com.",
  "version": "1.0.0",
  "icons": {
    "16": "media/js16.png",
    "48": "media/js48.png",
    "64": "media/js.png",
    "128": "media/js128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "JanuszStock"
  },
  "permissions": [
    "https://app.webull.com/*"
  ],
  "background": {
    "scripts": [
      "3rd-party/jquery-3.2.1.min.js",
      "3rd-party/jquery.csv.min.js",
      "bgp.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "https://app.webull.com/*"
      ],
      "js": [
        "3rd-party/jquery-3.2.1.min.js",
        "content_webull.js"
      ]
    }
  ]
}